Portable milling machine



R. MAcPHERSONI I PORTABLE MILLING MACHINE.

APPLICATION FILED MAY 20. 1921 1 #137,813, Patented Dec. 5, 1922.

3 SHEETS-SHEET I.

Kg Illl M m INVENTOR BY ATTORNEY R. MAcPHERSON.

PORTABLE MILUNG MACHINE.

APPLICATION FILED MAY 20; 192].

Patented Dec. 5, 1922.

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PORTABLE MILLING MACHINE.

7 APPLICATION FILED MAY 20. I921- 1,437,813, Patented Dec. 5 1922.

3 SHEETSSHEET 3.

IIIIII IIIIII I INVENTOR BY ATTORNEY collar 8 on'nut 9, 1). is located in a longitudinal channel or groove10 in the front face of guideway 9} seated at. s, 1922.

f Iii-siren stares 7 ROBERT MAOPHEBSO1\T,4 or nsw'rosn, NY. I

PORTABLE MILLING MACHINE. v 8

Application filed May 20, 1921. Serial no. 471,169.

To all w/wmit ma z com-67m:

Be it known that 1, ROBERT MnolrrnnsoN a citizen of the United States, and resident of New York city in the county of New York and State of New York, have invented certain new and useful Improvements in Portable Milling Machines, of which the following is a specification.

The object of my invention is to provide a portable tool capable of operating in the nature of a milling machine. drill oranalogous machine tool, which can be moved to the work and operated-many desired location. My improved tool is adapted to be used for repair work on machines of large size to avoid thenecessity of dismantling such machines for certain kinds of repairs or alterations thereon.

My invention comprises novel details of improvement that will be more fully herein'after set forth, "and I then pointed out in the claims. 8 7

Reference is to be had to the accompanying drawings forming part hereof, whereiny 1 is a side view of my improved tool; Fig.2 is an enlarged detail view of drive gears for a milling cutter saw or the like; Fig. 3 is a plan view; Fig. 4: is an enlarged detail plan view; partly in section; Fig. 5 is an enlarged end view, looking from the left in Fig.1, partly in section; F ig. 6 is afdetail sectional view illustratingthe shaft for the cutting tool, and Fig.7 is a cross section on line 7, 7 in Fig. 6.

Similar numerals of reference indicate corresponding parts in the several views.

The numeral 1 indicates 'a main support, which may be in the form of an angle-iron casting. shown provided with a longitudinal guideway along one face and a rearward flange 1. A main slidable member 3 is adjustably guidedupon guideway 2 by means of a groove 3 in the rear face of said member, (Fig. 5)- Screws 4 carried by member 3 cooperate with guideway 2 preferably by means of gib 5 "to securely retain member 3. in set position on support 1. A

screW G is journaled longitudinally along support 1 bymeans of bearings at 7, being retained from longitudinal movement by Said screw and receives a nut or; threaded projection 11 that extends rearwardly from member (Fig. 1).

in suitablebearings. (Fig. 5

g into channel 10, (Fig. Screw 6 may be rotated by crank 12 to adjust member 3 along support 1. Member 3 carries a bracket 13 having a base 13 fitted to the outer side of member 3. Base 13 is rotatively attached. tomember 3by means of bolts 14 passing through saidbase and having their hea'ds in circular "if-slot 15 in memberjii, -Bracket 13 will beheld firmly in adjusted position when nuts 16 are set tight against base 18. Bracket 18 carriesfa guide member 17 adjustably supporting a'block 18 by means 0). its gui'deway 17 receiving guideway projection 18 on said -block,*'(Fig. By means of screws 19 and gib 20 the block18 may be held in set position on guide member 17. A. screw 21 is journaled on arm 22 projectingfrom guide member 17 and cooperateswith block 18 to ad ust it on member '17.-'Acollar 23 and but 24 on sorew21 cooperate with arm 21 to'rotatively retain the screw. The guide member 17 is rotatively retained'on bracket 13 by bolts 25, the heads of which arelocated in annular T-slot 26 in member 17, I When nuts 27' are set tight on bolts 25 against bracket 13 the guide member 17 willbeheld in axially adjusted posi- "tion'to correspondingly position block 18. Block 18'adiust'ably carries a head 2 that is'p'rovidecl with means to support and drive a milling cutter or other tool. Block18 has a transverse guide 29 on one sideslidably receiving guide groove 28 of head 28,"(-F1g".

whereby the head niaybe adjusted relatively tothe block. "By means of screws 30 and gib81' thehead may be secured in set position on block 18, ates with block 18 and is journal'ed in arm A. screw 32' cooper- 33011 head 28 by means of collar 3i and nutwhereby said head mav be adiusted along-the block. The head 28 is provided with a drive shaft 36' rotatively supported 7 By preference shaft 36 i'srotated by suitable gearing from adrivespindle 37 adap ed'to be operated'by suitable powerfsuchas an electric or airmotor (not shown) attached to said "spindle in any well known way, to be 'moved about with the tool flexible feed conductors or hose for the motor permitting supply of electric'current or air to the'motor in any position of the tool. Spindle 37 is provided with a pinion or gear 38 in mesh l with a'gear 39Qrotative o'n a stud 40 car- "lfldby head28; pinion or gear 41sei to the work. 1 work by screw 6 to feed the cutter or shaft cured to gear 39 meshes with a gear 42 secured to shaft 36. The ratio of the'gearing shown may be varied. Shaft 36 is intended to drive a milling cutter, saw, drill or other analogous tool. For the purpose of operating cutters, saws and the like I provide a shaft 43 journaled in bearings 44, 45 carried by head 28, andlocated at a right angle to shaft 36. Shaft 43 is provided with a gear 46 adapted to mesh with a gear 47 carried by shaft 36. Gear 47 is shown provided with a taper shank 47 engaging a taper socket 36 at the outer end of shaft 36. Shaft 43 and shank 47 with its gear 47 may be removed and a drill-end mill or milling cutter may be substituted in socket 236*. Head 28 is shown provided with a hole 28 (Fig. 1), for insertion of a tool to dislodge shank 47 or a drill from socket 36 For convenience in assembling shaft 43 and gears 46, 47 on head 28 I prefer to form shaft 43 in two parts 43, 43 respectively journaled in bearings 44, 45 with gear 46 therebetween. Shaft part 43 is shown provided with an extended threaded part 43, (Fig. 6), screwing into corresponding recess 43 in shaft part 43 after passing through a hole 46 in gear 46, (Figs. 2 and 6) whereby the gear is clamped between the shaft parts. Pins 48 projecting from shaft part 43 into holes in gear 46 aid in rtating the latter. Washer 49 and nut O on shaft 43 retain the shaft in position in conjunction with'washer 51. A cutter or saw A may be secured on shaft 43 by washer 49 and nut 50. A shoulder 52 on shaft 43 in conjunction with washer 53 resists thrust of the shaft. A sleeve 54 on shaft part 43 with nut 55 provides for retaining a cutting tool A on the shaft. I I

My improved tool provides simple and effective means cooperate a cutting instrument or tool in various relations and at different-angles according to the Work to be accomplished, being particularly adapted to be supported upon or adjacent to a machine to be repaired or altered. The support 1 "pen a machine to be repaired and various acjustments ofthe components of my tool may be made to present the cutter or drill Member3 may be fed to the may be secured by suitable clamping means 43. bracket 13 maybe adjusted axially as required; block 18 may be adjusted, or fed to the work, on member 17, and the latter may be adjusted axially on bracket. All such adjustments and feedings correspondingly affect head 28 and the cutter or tool supported thereby, and said head may be adjusted or fed by screw 32. The entire machine tool may be supported at any de-' sired angle and close adjustments for the work tobe done may be effected by the'comslidably and ponents of the tool. Various usually costly and difticult operations may be performel with the tool, such as boring, di ling or tapping. and cutting key-ways, grooves 0r slots, either strai it or with angular portions, since a cutter maybe fed in various directions by operating any of the screws 6, 531 and 32 in desired order. By means of my improvements repairs and altera tions on machinery, engines and the like may be made in sitn, in many instances, v. .thcut requiring dismantling of the parts, removal to machine tools, and reassembling, thereb effecting great'savingin accomplishing such work.

A head 23 without bearings 44, 45 shaft and years 46, 47, but having the taper socket 36 for a drill, may be substitutes for the head described having said bearings. shaft and gears. where certain kinds of drilling is to be performed.

Changes may be made in the details and arrangements of parts set forth, within the scope of the appended .claims, without departing from the spirit of myinvention.

Having now described my invention, what I claim is:

1. A. portable machine tool comprising a support, a member slidably carried thereby,

means to feed said member along the support, a head provided with means to support and drive a tool, a bracket rotatively carried by said member, means to retain the bracket in rotative positions of adjustment, a block rotatively j carried by the bracket, means to retain the block in angular positions of adjustment on the bracket, means to'feed the blockat. an angle to the feeding of the member, and means supporting the head upon the block for movement at an angle .to the feeding of the block.

2. A portable machine tool comprising a support, a member slidably carried thereby, means to feed said member along the support, a head provided with means to support and drive a tool, a bracket rotatively carried by said member, means .to retain the bracket in'rotative positions of adjustment, a block slidably and rotatively carried by the bracket, means to retain the block in angular positions of adjustment on the bracket,

means tofeed the blockat an angle to the feeding of the member. means supporting the head upon the block for movement at an angle to the direction offeed of the block, and means to feed the head on the block.

3.14 portable inachine tool comprising a support, a member sli .dably carried thereby, means to feed the member alongthesupport, a headmovably carried by said member and providedwith a drive shaft, said head-having a shaft journaled at an angle to the first named shaft and provided with means to re tain a tool, and gearing connecting said shafts forrotating one by the other.

4. A portable machine tool comprising a support, a member slidably carried thereby, means to feed the member along the support, a head movably carried by said member and provided with a drive shaft, said head'haw ing; a shaft journaied at an angle to the first named shaft and provided with means to retain a tool, said shaft comprising a plurality of parts, a gear secured between said shaft parts, and a gear secured to the first named shaft ab re the first named gear and in mesh therewith.

portable machine tool comprising a support, a member slidably carried thereby, means to feed the member along): the support, a head movably carried by said member and provided with a drive shaft, said shaft being provided With means to retain a tool, said head having spaced bearings at an. angle to the first named shaft, a shaft journaled in said bearings beyond the first named shaft, the second named shaft being provided with meansto retain a tool, and meshing gears upon said shafts between said bearings.

6. A portable machine tool comprising 11 support, a member slidably carried thereby, me ans to feed the member alon the support,

a head movably carried by sai member and provided with a drive shaft, said shaft being provided With means to retain a tool, said of New York, and State of New York, this 19th day of May A. 1)., 1921.

ROBERT MAOPHERSON. 

